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Details	EV-TRACK ID	Experiment nr.	Species	Sample type	Separation protocol	First author	Year	EV-METRIC
	EV140032	1/1	Homo sapiens	NAY	(d)(U)C DG Filtration	Lee HD	2014	67%
Study summary Full title Exosomes derived from human macrophages suppress endothelial cell migration by controlling integrin trafficking All authors Lee HD, Kim YH, Kim DS Journal Eur J Immunol Abstract Integrin trafficking, including internalization, recycling, and lysosomal degradation, is crucial fo (show more...)Integrin trafficking, including internalization, recycling, and lysosomal degradation, is crucial for the regulation of cellular functions. Exosomes, nano-sized extracellular vesicles, are believed to play important roles in intercellular communications. This study demonstrates that exosomes released from human macrophages negatively regulate endothelial cell migration through control of integrin trafficking. Macrophage-derived exosomes promote internalization of integrin ?1 in primary HUVECs. The internalized integrin ?1 persistently accumulates in the perinuclear region and is not recycled back to the plasma membrane. Experimental results indicate that macrophage-derived exosomes stimulate trafficking of internalized integrin ?1 to lysosomal compartments with a corresponding decrease in the integrin destined for recycling endosomes, resulting in proteolytic degradation of the integrin. Moreover, ubiquitination of HUVEC integrin ?1 is enhanced by the exosomes, and exosome-mediated integrin degradation is blocked by bafilomycin A, a lysosomal degradation inhibitor. Macrophage-derived exosomes were also shown to effectively suppress collagen-induced activation of the mitogen-activated protein kinase/extracellular signal-regulated kinase signaling pathway and HUVEC migration, which are both dependent on integrin ?1. These observations provide new insight into the functional significance of exosomes in the regulation of integrin trafficking. (hide) EV-METRIC 67% (94th percentile of all experiments on the same sample type) Reported Not reported Not applicable EV-enriched proteins Protein analysis: analysis of three or more EV-enriched proteins non EV-enriched protein Protein analysis: assessment of a non-EV-enriched protein qualitative and quantitative analysis Particle analysis: implementation of both qualitative and quantitative methods. For the quantitative method, the reporting of measured EV concentration is expected. electron microscopy images Particle analysis: inclusion of a widefield and close-up electron microscopy image density gradient Separation method: density gradient, at least as validation of results attributed to EVs EV density Separation method: reporting of obtained EV density ultracentrifugation specifics Separation method: reporting of g-forces, duration and rotor type of ultracentrifugation steps antibody specifics Protein analysis: antibody clone/reference number and dilution lysate preparation Protein analysis: lysis buffer composition Study data Sample type Cell culture supernatant Sample origin NAY Focus vesicles exosomes Separation protocol Separation protocol Gives a short, non-chronological overview of the different steps of the separation protocol. dUC = (Differential) (ultra)centrifugation DG = density gradient UF = ultrafiltration SEC = size-exclusion chromatography IAF = immuno-affinity capture (d)(U)C DG Filtration Adj. k-factor 138.6 (pelleting) Protein markers EV: ADAM10/ TSG101/ CD9/ ADAM15/ GAPDH non-EV: Proteomics no EV density (g/ml) 1.09-1.13 TEM measurements 70-80 Show all info Study aim Function Sample Species Homo sapiens Sample Type Cell culture supernatant EV-harvesting Medium serum free Separation Method (Differential) (ultra)centrifugation dUC: centrifugation steps Below or equal to 800 g Between 800 g and 10,000 g Between 10,000 g and 50,000 g Between 100,000 g and 150,000 g Pelleting performed Yes Pelleting: time(min) 60 Pelleting: rotor type SW55 Pelleting: adjusted k-factor 138.6 Density gradient Only used for validation of main results Yes Lowest density fraction 0.25 Highest density fraction 2 Orientation Top-down Filtration steps 0.22µm or 0.2µm Characterization: Protein analysis Western Blot Detected EV-associated proteins CD9/ TSG101/ ADAM10/ ADAM15/ GAPDH ELISA Detected EV-associated proteins ADAM10/ ADAM15/ GAPDH Characterization: Particle analysis EM EM-type scanning EM Image type Close-up, Wide-field Report size (nm) 70-80

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EV-TRACK ID	EV140032
species	Homo sapiens
sample type	Cell culture
cell type	NAY
condition	NAY
separation protocol	(d)(U)C DG Filtration
Exp. nr.	1
EV-METRIC %	67